I've wanted one of these since selling my 100-400 hoping for something for outside that's not so big. Had suggested it to a friend who shoots a lot in places like Alaska through a special window in his plane set up just for photography.
Side by side with the beloved 24-70, it's just a tweek longer when short and extended it sticks out an inch or two more. But closed up it's about the size of the shorter zoom and 3.5 ounces more.
It feels seriously solid and playing with it, the IS seems remarkable, I think I'm pretty good at being steady anyway but this looks impressive.
He's doing a bunch of flying over the next few weeks, and will take it with him on location and I'll get to see the photos. He shoots a lot with the MKIII but often the IDSMKIII and tends to print as big as he can, lots in the 30-40" wide scenics with pretty amazing results. I'm continually impressed by what he gets out of the smaller 1.3 crop MKIII which is his favorite go to camera even though he owns both.
I know I want one of these lenses, reports on image impression have been very good; sharpness should be a given with one of the newer L series lenses, it's the rest of the "look" that I'm interested in.
I've reduced my own kit to very little, just two lenses that I use like crazy and in the mid ranges, but this one will probably be my next choice, if it ever stops raining around here.


